Which sentence does not contain any errors in comma usage? A. The boys were late for the bus but luckily the bus was also late. B. We can go on a picnic, or we can go swimming. C. Some people wanted to postpone the vote and others demanded a vote that very night. D. There was no moon that night so, we couldn't see the street well.
The answer is B because the comma is connecting two independent clauses. When connecting independent clauses, you use coordinating conjunctions, which you can remember as FANBOYS (For, and, nor, but, or, yet, so)
